The presence of a widow's peak (pointed hairline on forehead) is inherited in a dominant manner. If two people who are heterozygous for widow's peak have children, what is the expected phenotypic ratio of their offspring

widow's peak children = 3/4

no widow's peak children = 1/4

Explanation:

Widow's peak is a dominant trait. Assuming that the gene that controls the trait is represented by the allele A, the alternate form (no-widow's peak) would be a.

If two people who are heterozygous have children:

                              Aa   x   Aa

                        AA    Aa    Aa    aa

widow's peak = 3/4

no widow's peak = 1/4

the expected phenotypic ratio of the offspring would be 3 to 1 widow's peak to no-widow's peak.

the two answers are a, the population of birds with large beaks will increase on the island, and c, the trait for large beaks will be passed on to future generations through natural selection. the reason for that is because if the birds that have beaks developed for eating small seeds lose all of their food, they will go hungry and eventually starve because they physically cannot eat the large seeds, therefore making the population of large beaked birds higher. also, if the trait of large beaks are dominant on the island over small beaks, then over time the large beaked birds will reproduce more and more, while the smaller beaked birds will reproduce less and less because they can't survive with the food provided. that leads to the trait of small beaks disappearing and the trait of large beaks taking over the island.

the circled areas are referred to   as sunspots.   the sunspots are cooler than the   surrounding area.

sunspots are temporary phenomena on the photosphere of the sun that appear visibly as dark spots compared to surrounding regions. they correspond to concentrations of magnetic field flux that inhibit convection and result in reduced surface temperature compared to the surrounding photosphere.